The assembly of the valve is a process that combines all the parts of a valve, which is the last manufacturing process of a valve. The process of assembling several parts to form a new part is the assembly of a part, while assemble several parts to a whole valve is the general assembly. The assembly greatly influences the quality of the valve. If the valve is assembled not well, the specific requirements can't be met even though there are accurate design and qualified parts. Leakages...
The Assembly of the Valve Read
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Alumina (AL2O3) Alumina (AL2O3) has good hardness and is widely used, which is usually used to grind workpieces made from cast iron, copper, steel and stainless steel. Silicon Carbide (SiC) Silicon carbide has two colors, that is, green and black, and its hardness is higher than that of alumina. Green silicon carbide is suitable for grinding hard alloys, while black silicon carbide is used for grinding brittle and soft materials, such as cast iron and brass. ...
The Selection of Abrasive Materials and Tools of Valves Read
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After a valve is used for a long time, the sealing surface of the valve disc and valve seat will be worn and the sealing will be weakened. Repairing the sealing surface is a very important task with a lot of workloads. The main method of repair is grinding. For the severely worn sealing surface, the surfacing is firstly conducted and then grounding after turning. The grinding of the valve includes the cleaning and inspection process, grinding...
The Grinding and Inspection of a Valve Read
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1. The structural characteristics of the double cut-off plug valve The double cut-off plug valve (Figure 1) is designed for special applications with strict sealing and cut-off requirements. The valve design is very compact; it is light and takes up small space. Also, the advantage of this valve design is that it is shorter than the conventional two shut-off valve and discharge valve. In most cases, the structural length of the double cut-off valve is the same as a common...
Structural Features of Double Cut-off Plug Valves Read
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2.3 The design and verification of valve stems A valve stem is the main part of a valve. If the valve is deformed or broken during use, it will cause an accident. Therefore, the strength of the valve must be checked to ensure that it can withstand the force within a certain range. 20Gr13 is used as the valve's material, which has good plasticity, toughness and wear resistance after heat treatment. The outer diameter of the valve is set to 70 mm, and the inner diameter...
The Optimal Structural Design of the Large Wedge Gate Valve (Part Two) Read
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Abstract By analyzing the working principle of the wedge gate valve with large diameters, an optimal design scheme for the structure of the wedge gate valve with large diameters is proposed. Design the size of the corresponding parts, and optimize the calculated size according to the use requirements; select the materials of each part reasonably. The results show that the design meets the requirement for strength. Background A gate valve with a large...
The Optimal Structural Design of the Large Wedge Gate Valve (Part One) Read
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Protection and management during construction 1. During the construction, it is very important to manage and protect the ball valve scientifically. The good management of the equipment can not only guarantee safety, but also greatly reduce the cost of construction and operation management. The following aspects should be paid attention to: ① Use precise methods to load and unload the valve to prevent mechanical damage to the valve. When hoisting the valve, the hoisting belt must not be tied...
Use and Maintenance of Ball Valves Used for Gas Pipes Read
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The problems existing in the tooling for strength and sealing performance tests of high-pressure valves are analyzed, and the structural characteristics, working principles and performance of the new type of testing tooling designed based on the principle of O-ring sealing are introduced in this article. 1. Overview The high pressure valve must be subjected to a strength test and a sealing performance test before leaving the factory. Frequent use of test tooling and high pressure...
Structural Improvement of the Test Tooling of High-pressure Valves Read
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What is a valve? In the fluid piping system, a valve is a control element whose main function is to isolate the equipment and the piping system, adjust the flow, prevent backflow, adjust and release the pressure. It can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal, and radioactive media. Since it is very important to choose the most suitable valve for the piping system, it is also important to know the characteristics...
Different Kinds of Valves Read
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Attention should be paid to the following precautions for installing valves: Confirm that the valve meets the design requirements and relevant standards before installing the valve. When moving and installing the valve, prevent bumps and scratches of the valve. Before installing the valve, clean the inside of the pipeline to remove iron filings and other impurities to prevent foreign matter from getting into the valve's sealing seat. In addition, the valve should be closed during installation....
Precautions for Installing Valves Read
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